Case for incandescent-electric-lamp sockets.



' A. WEBER, SR.

CASE FOR INCANDESCENT ELECTRIC LAMP SOCKETS.

APPLICATION FILED DEC. 19, I914.

LM5JO5O E PatentedJuly 6,1915.

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WW. 7 \w a? By AUGUST WEBER, SR., OF SCI-IENECTADY,

NEW YORK, ASSIGNOR TO ELECTRIC COMPANY, OF SGHENECTADY, NEW YORK, ACORPORATION OF'NEW YORK.

CASE FOR INCANDESCENT-ELECTRIC-LAMP SOCKETS.

Specification of Letters Patent.

Patented July 6, 19315.

Original application filed August 4., 1906, Serial No. 329,153. Dividedand this application filed December 19, 1914. Serial No. 878,189.

{I '0 all whom it may concern:

Be it known that I, AUGUSTWEBER, Sr., a citizen of the United States,residing at Schenectady, county of Schenectady, and State of New York,have invented certain new and useful Improvements in Cases forIncandescent-Electric Lamp Sockets, ofv

which the following is a specification.

The invention relates to such improvements and consists in the novelconstruction and combination of parts hereinafter described andsubsequently claimed.

Reference may be had to the accompanying drawings, and the referencecharacters marked thereon, which form a part of this specification.Similar characters refer to similar parts in the several figurestherein.

Figure '1 of the drawings is a view in side elevation of an incandescentelectric lampsocket provided with my improved case. Fig. 2 is a similarview of the cap of the ease detached. Fig. 3 is a horizontalcrosssection of the cap, taken on the broken line 33 in Fig. 2. Fig. 4is a view in side elevation, partly in vertical section, of the shell ofthe case in a position at right angles to that seen in Fig. 1. Fig. 5 isa horizontal cross-section of the case, taken on the broken line 55 inFig. 1. Fig. 6 is a view in side elevation of a modified form of cap.Fig. 7 is a horizontal cross-section of the same, taken on the brokenline 7-7 in Fig. 6. Fig. 8 is a vieivsimilar to Fig. l, showing amodified form of construction of the shell.

This application is a division of an application filed by me August et,1.906, Serial No. 329,153, for cases for incandescent electriclamp-sockets.

The principal object of my invention is to provide for easily andsecurely connecting together, and for easily separating when de-' sired,the cap and shell. of a sheet-metal case, such for example, as the caseof an incandescent electric lamp-socket.

Other objects of the invention will appear in connection with thefollowing description.

Referring to the drawings wherein the invention is shown inpreferred'form, 1, represents the shell or body and, 2, the cap,

together comprising the case for an ordinary incandescent electriclamp-socket. The shell and cap are formed of sheet-brass or othersheet-metal and are adapted to be ap plied, one to the other,telescopically. For use with a key-socket, the shell is provided with anopen slot, 3, through which the shaft of the key, 4, projects.

Inthe keyless type of socket, said slot may be omitted, or it may beretained of full or reduced dimensions to permit the compression of theshell, if desired to facilitate the separation of the interlocking partsof the shell and cap. The shell is provided near its larger end with oneor more offsets, 5, which are tubular displaced portions of thesheet-metalitself of which the shell is made. The inner portions of thesides of these offsets are approximately at right angles to the body ofthe shell, and their outer ends are beveled or tapered to facilitate theautomatic interlocking of the parts as the case-members aretelescopically assembled. The cap is provided, at a point or pointscorresponding with the location of the offsets, 5, with an aperture orapertures, (3, cut therein adapted to receive said offset or therespective offsets.

In the preferred form of the invention the cap. and shell aretelescopically assembled by a movement having a rotational component;and as shown in Figs. 1, 2 and 3, the cap is provided, at one side ofthe aperture, (3, with a similar aperture, 7, he two apertures beingconnected by a slot, 8, which tapers gradually from the aperture, 7, tothe aperture, (3, whereat it is of less width than the diameter of saidaperture and of the offset, 5, leaving the aperture, 6, inclosed by awall formed by the cut edge of the sheet-metal, extending considerablymore than 180 degrees around the circumference of the aperture, whereby,when one of the oiisets, 5, is seated in one of the apertures, 6, itsremoval from said aperture along the slot, 8, is resisted by rigid cutedges of sheet-metal at the points, 9, in the path of perpendicularportions of the ofl" set, Leading from the aperture, 7, t0 the edge ofthe cap is a groove formed by outwardly displacing the sheet-metal, asat 10.

In applying the cap to the shell, the groove, 10, is brought into linewith an offset, 5, and the parts are assembled in bayonet fashion, byforcing the cap, first telescopically upon the shell, causing theoffset, 5, to traverse the groove, 10, and enter tile aperture, 7, andthen rotatively moving the cap upon the shell to cause the beveled endof the offset, 5, to travel along the slot, 8, until it enters theaperture 6. The offset, 5, being slightly beveled will center itself inthe slot, 8, and be guided thereby, at the same time forcing outwardlythe sheet-metal walls bordering said slot until. the offset enters theaperture, 6, whereupon the resiliency of the sheet-metal walls of theslot, 8, cause them to resume their normal position, the final seatingof the offset in the aperture, 6, being accomplished with a snapaction.

To separate the cap from the shell, the cap may be first rotativelymoved in. the opposite direction and then telescopically separated fromthe shell. The removal of the cap can be accomplished by compressing theshell by the fingers of one hand, while the cap is being removed by theother hand.

In the construction. shown in Figs. 6 and- 7., the aperture, 7, andslot, 8, are omitted, the cap being provided with a bayonetshaped grooveformed by displacing the sheet-m'etal, as shown at, 12, the outer end ofsaid groove terminating at the edge of the shell, andits inner end atthe aperture, 6, the inner end of said groove being of less width thanthe diameter of the aperture, 6 and of the offset 5.

The'operation of connecting and disconnecting the cap and shell in thisconstruction is the same as above described. The edge of the shell ispreferably provided with a notch, 18, at the mouth of the groove, whichnotch is adapted to receive the offset, 5, and serve as a guide inapplying the cap to the shell. The cut-sheet-metal walls of 3 Ma theseat for the locking projection are rigid in that they do not yield. toeither rotative strain or pullingapart strain, but offer positiveresistance thereto, which prevents separation of the case-members untilthe inner member is manually compressed. The sides of the offset or proection, 5, are substantially perpendicular so that they offer apositi've resistance to said rigid cut-sheetmetal wallsof the seat forthe projection, making it impossible to separate the casemembers untilthe inner member is manu ally compressed; and in the preferred form ofthis projection its outer end is so beveled as to enable the parts toautomatically-interlock with a snap action as the case-members areassembled, that s, no manual compression of the inner case-member isrequired in assembling and locking the casemembers together. Forconvenience in pressing outthe projection in tubular form from thesheet-metal wall itself of thesleeve, an aperture, 15, may be formed inthe outer end ofthe projection, as shown in Fig. 8.

'What I claim as new and desire to secure by Letters Patent is-.

1. An incandescent electric lampsocketcase comprising a pair ofsheet-metal members, one adapted to telescopically receive the other,the inner of said members being compressible, one of said members beingprovided with an aperture through its wall having, rigid cut sheet-metaledges, the

other of said members having anintegral tubular projection pressed outfrom its sheet-metal wall, said projection being adapted to interlockwith said aperture and having perpendicular sides presented to the rigidcut-sheet-metal edges of said aperture in a direction to preventrelative rotation and telescopic separation of the interlocked membersuntil the inner member is manu ally compressed.

2. An incandescent electric lamp-socketcase comprising a pair ofsheet-metalmembers, one adapted to telescopically receive the other, theinner of said members being compressible, one of sald members beingprovided with an aperture through its wall having rigid cut-sheet-metaledges, the otherv of said members having an integral tubular projectionpressed out from its\sheet-metal wall, said projection having arpeveledend whereby it is adapted to automatically inter lock with said apertureas the 'melnbers are telescoped together and having perpendicular sidesengageable with the rigid cut-sheetmetal edges of said aperture in adirection to Gopiesof this patent may be obtained for five cents each,by addressing the Commissioner 'of Patents,

' Washington, I). O.

